I was planning in installing a new sound system in my 2000 toyota corolla ce, but i need some more info on the electrical system in the toyota. I know the altenator in the 2000 corolla is a 80 amp altenator, but don't know how much of that ampage the electrical system uses. I know if I install amplifiers in my car that will use a substantial amount of power. I plan on installing a system about 500 watts or so. Any help will be most appreciated.